Hot-air furnace



(No Model.) 3 Sheets-Shet 1.

G. W. WALKER.

HOT AIR FURNACE.

No. 451,962. Patented May 12,1891.

(No Model.) 3 Sheets-Sheet 2.

G. W. WALKER.

HOT AIR FURNACE. No. 451,962. Patented May 12, 1891.

(No Model. 3 Sheets-Sheet 3. Q

G. W. WALKER.

HOT AIR FURNACE.

No. 451,962. Patented May 12, 1891 THE mmms rzTzRs co, Puovmumm, WASKINQYON, n. c.

UNITED STATES Fnrnnr rrrcn.

GEORGE IV. \VALKER, OF MALDEN, MASSACHUSETTS.

HOT-AlR FURNACE.

SPECIFICATION forming part of Letters Patent No. 451,962, dated May 12, 1891.

Application filed September 29, 1890. Serial No. 366,491. (No model.)

To ctZZ whont it may concern.-

Be it known that I, GEORGE W. WALKER, of Malden, county of Middlesex, State of Massachusetts, have invented an Improvement in Hot-Air Furnaces, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its obj ectto improve the construction of hot-air furnaces in such manner that the waste particles of combustion may be led from the furnace into the chimney from the rear or from either side of the furnace, according to the position where the furnace is to stand, thus enabling the front of the furnace to be located just where wanted.

In accordance with my invention I have attached to the upper end of the combustionchamber a series of like collars, and with these collars I have combined a series of independent detachable and interchangeable heads to receive the flue-pipes extended therefrom downwardly to the base of the heater. I have also provided the heater with a cruciform base having a receptacle provided with a cover, which may be removed when the part of the base in communication with the vertical fiues needs cleaning.

Figure 1 is a vertical cross-section of a furnace embodying myinvention, the smoke-pipe being shown as led from the right-hand side of the furnace; Figs. 2 and 3, details of the head and collar; Fig. 4, a section in the line m, Fig. 1; Fig. 5, a section in the line :20; and Fig. 6 is a vertical section at right angles to Fig. 1.

Referring to the drawings, A represents the ash-pot, A the usual grate above it, and B a boiler-plate, fire-pot, and combustion-chamber having a crown-sheet B and provided near its upper end with a series of exits a b 0, out through either two of which the products of combustion and gases arising therefrom may be' made to pass, as desired.

The combustion-chamber has connected to it by suitable bolts outside the openings at b c a series of like collars a Z) 0, having, as represented, a groove 2 (see Fig. 2) to receive a tongue or flange 3 of either of the heads e or f, there being in practice two like heads 6 and a third headf, the head f differing from the heads 6 in having a neck f, over which may be placed the usual smoke-pipe leading to the chimney. In setting up the furnace the operator will put the front of the furnace in the position most convenient for feeding it, and thereafter he may change the heads 6 f from one to the other collar, as desired, according to which is nearest the chimney. The fluepipes a b c are interposed between the heads and the base-plate O, the shape of which is best shown in Fig. 4, it having a series of arms 0*, having a series of like grooves 4. This plate also has a central opening in which is laid a removable cover 0*. of the heads have like grooves. The upper and lower ends of these flue-pipes enter these grooves, and in practice either the upper, or it may be the lower, end of each pipe is fastened in one of these grooves smoke and air tight.

In the drawings I have shown the upper ends of the pipes as so fastened by screws 6. The end which is not so fastened will be made to enter loosely a groove 4:, as represented at the lower end of the pipes in Fig. 1, where the size of the groove is somewhat exaggerated, the said groove in practice being filled with kaolin or other packing, into which the end of the pipe will be embedded, as shown by heavy black lines in Fig. 1. Now as the combustion chamber heats and expands faster The under sides 7 than the flue-pipes, thelatter rise at the speed i of and with the combustion-chamber and slip or telescopein the joint 4 referred to.

The base-plate O has connected to its lower side by bolts 13 in holes 14 apanlike bottom plate 0 of cruciform shape, as shown best in Fig. 5, the spaces between the arms O and the projecting arms of the bottom plate forming parts of the flue-space.

The base-rim D of the furnace supports the plate 0, and the latter supports the jacket or casing D, in which is the dome D thus leaving an air-space all about the combustionchamber and flue-pipes for the circulation of air, which enters suitable holes or openings in the base-rim, which rests on the cellarfloor, the air rising in the jacket being heated and being conducted from the dome in usual manner into the rooms to be heated.

The collar to which the head f is attached will be supplied with any usual damper, as h, controlled by any usual red, as h.

The fire-pot and the ash-pot will have usual projections, having doors by which to afford means to enable the furnace to be fed with coal and the ashes to be removed at will.

The soot and dust deposited from the products of combustion collect in the chamber below the plate or cover 0*, and by removing the cover the ash-pot door 0 being open, a shovel may be introduced to clear out the said material, this being done at the front of the furnace rather than at the rear of the furnace, as has been done heretofore in other furnaces ordinarily in use.

The heads and collars are united by bolts m, (see Figs. 2 and 3,) extended through ears of the collars and heads, the ears of the heads being slotted, as shown, to avoid removing the bolts when the head is to be changed.

It will be understood that the depth of the grooves 4 and the normal position of the lower ends of the flue-pipes therein will be such as to also provide for faster expansion of the flue-pipe as compared with the fire-pot or combustion-chamber B, and the depth of the groove will be such that should the flue-pipes expand the more rapidly they would not by the contact of their ends with the base-plate lift the combustion-chamber B from the said plate.

It will be understood that the combustion-chamber above the grate will and may be lined in any usual manner, the said lining not being herein represented.

I am aware that furnaces have been provided with elbow-shaped heads riveted at one end to the combustion chamber, the down-turned ends of the said elbow-shaped heads receiving the vertical flue-pipes, as in United States Patent No. 388,293; but in the furnaces shown in the said patent there is no adaptability or provision made for changing the exit-pipe readily from one to the other side of the furnace according to the position desired for the front of the furnace, which is one of the essential features of this invention.

I claim 1. The base-plate Cand the fire-pot or combustion-chamber having connected to it a se ries of like collars, combined with independent detachable heads cf, interchangeable with the said collars, and wit-l1 flue-pipes intermediate the said headsand the said base-plate, whereby by changing the heads from one to another collar the same furnace may be quickly adapted to any particular location desired for the front thereof, substantially as described.

2. The base-plate O and the fire-pot or combustion-chamber having connected to it a series of like collars, combined with independent detachable heads 6 f, interchangeable with the said collars, and with flue-pipes intermediate the said heads and the said baseplate and having a telescopic connection at one end, as described, to enable the flue-pipes to slip as required, owing to unequal expansion, substantially as set forth.

3. The fire-pot or combustion-chamber, the ash-pot, the base-plate having p'roj eetin g arms 0*, the pan-like bottom plate C, of cruciform shape and having a cover, and the collars and heads, combined with the flue-pipes between the said heads and the projecting arms of the base-plate 0, whereby by the removal of the said cover any material accumulated in the bottom plate or its flue-spaces may be readily cleaned out at the front of the furnace through the ash-pit door, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEO. \V. XVALKER.

With esses:

GEO. W. GREGORY, EDITH F. GUILD. 

